Breaking of sub aerial stems of eichhornia helps in propagation
Answers
Answered by
0
A number of herbaceous plants find it impossible to survive above ground during unfavourable seasons of the year, usually the winter. Thus, they are short living annuals. Many such plants store up food material in the underground parts.
When the aerial’ shoot withers away during the unfavourable season the underground parts remain safe. Next spring, as the season again becomes favourable, aerial shoots come out which ultimately flower and again die next year after storing up food underground.
Perennation is ensured this way by vegetative reproduction. These underground structures, although not green, are recognised to be stem structures because of (1) the presence of nodes and internodes; (2) scale leaves and adventitious roots coming out from the nodes; (3) buds at the axils of scale leaves, at the apices of these underground structures and on the apices of their branches; and (4) their anatomical structures which resemble stems.
When the aerial’ shoot withers away during the unfavourable season the underground parts remain safe. Next spring, as the season again becomes favourable, aerial shoots come out which ultimately flower and again die next year after storing up food underground.
Perennation is ensured this way by vegetative reproduction. These underground structures, although not green, are recognised to be stem structures because of (1) the presence of nodes and internodes; (2) scale leaves and adventitious roots coming out from the nodes; (3) buds at the axils of scale leaves, at the apices of these underground structures and on the apices of their branches; and (4) their anatomical structures which resemble stems.
Similar questions